One Life Diet
Verified listingAbout One Life Diet
What is One Life Diet?
One Life Diet is a medical weight loss practice with offices in Solana Beach and Carlsbad. It also offers a Long Distance Weight Loss Program for people who live farther away, managed remotely under the same physician-supervised approach. Dr. Jonathan Haynes, MD, a family physician, founded the practice, and he is the only physician identified by name.
Treatment centers on a weekly visit paired with medication. Depending on the patient, the approach may be the practice's natural supplements, a prescription appetite suppressant (phentermine), semaglutide, or tirzepatide. Semaglutide and tirzepatide are both given as weekly injections. The practice also runs an Initial Visit, Weekly Visits, and a Maintenance Program for keeping weight off after a goal is reached. Google shows a rating of 5 from 9 reviews.
This listing is for its Solana Beach office at 153 N Hwy 101 #200.
What does it cost?
Pricing is per visit. The Initial Visit is $285 and includes a thirty-minute one-on-one consultation, the One Life Diet book, your first medication, a vitamin injection, and a one-month supply of pyruvate. Each Weekly Visit is $105. Medication adds a weekly surcharge of $50 to $75 for semaglutide or $65 to $110 for tirzepatide, depending on the drug. It does not state whether the $105 visit fee plus the surcharge is the whole weekly bill.
The practice does not bill insurance. It accepts Flexible Spending Accounts (FSA) and Health Savings Accounts (HSA), and no financing option is listed. On membership, it says: "Because what we do works, we don't need contracts. It's that simple." Cancellation terms are not published.
What should you ask before you book?
Ask who writes your prescription and which physician you would see each week. Only Dr. Haynes is named, so ask who would sign your prescription and who would handle your visits.
Ask whether the medication is included in the weekly fee or added on top of the $105 visit. Ask whether the semaglutide or tirzepatide is brand-name or compounded. Ask what follow-up visits and lab work cost, since no separate fees are listed. Ask how cancellation works and how much notice you need to give. No hours are published, so ask when the office you would use is open. If you are considering the long distance program, ask how labs, prescriptions, and follow-up are arranged where you live.
Who is it a good fit for?
This is a good fit if you want a physician to see you in person each week or through the remote program, you plan to pay out of pocket or through an HSA or FSA, and you are comfortable confirming the full weekly cost before you book. If you need insurance billing, financing, or published cancellation terms, this practice does not list any of them.
Sources: onelifediet.com, onelifediet.com/glp-1, onelifediet.com/pricing, onelifediet.com/locations-1
Services Offered
What we confirmed
Read off One Life Diet’s own website on 2026-10-11. These are their words, not ours.
- ✓Medical weight loss — listed on their site as “That’s why we offer two powerful, medically supervised injectable options: Semaglutide and Tirzepatide” source
We have not yet collected published prices or prescriber credentials for this clinic. When we do, they will appear here with a link to the page they came from — or a note saying the clinic publishes none, which is itself worth knowing. Call them for a price in the meantime.